Halide-ligand-dependent performance of AgBiS2 nanocrystal/ZnO heterojunction solar cells

The carrier transport properties of solar cells fabricated with colloidal AgBiS2 nanocrystals (NCs) are affected by the type of ligands adsorb by the nanoparticle surface, the coverage, and the coordination state. We focus on halide ions (F−, Cl−, Br−, and I−) to passivate the surface of AgBiS2 NCs...

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Bibliographic Details
Published in:Chemistry letters 2022-01, Vol.51 (X), p.1004
Main Authors: Xiao, Yun, Wang, Haibin, Awai, Fumiyasu, Shibayama, Naoyuki, Kubo, Takaya, Nakazaki, Jotaro, Segawa, Hiroshi
Format: Article
Language:English
Subjects:
Adsorption
Carrier transport
Figure of merit
Heterojunctions
Ligands
Nanocrystals
Nanoparticles
Photoelectrons
Photovoltaic cells
Solar cells
Surface chemistry
Transport properties
X ray photoelectron spectroscopy
Zinc oxide
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Summary:The carrier transport properties of solar cells fabricated with colloidal AgBiS2 nanocrystals (NCs) are affected by the type of ligands adsorb by the nanoparticle surface, the coverage, and the coordination state. We focus on halide ions (F−, Cl−, Br−, and I−) to passivate the surface of AgBiS2 NCs and investigate their adsorption behavior using X-ray photoelectron spectroscopy (XPS) in this study. The adsorption strength of ligands was a useful figure of merit that can explain the correlation between the ligand type and solar cell performance. The Br ligand achieved the best NC passivation among the four halide ligands. Therefore, the cell with a Br ligand shows the highest solar cell performance.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.220331